Shuttle casing for sewing machine



Jan. 29, 1935. l. GoNYK SHUTLE GASING FOR SEWING MACHINES Filed June 19.1933 m/ZV, l

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Patented Jan. 29, 1935 4 UNITED STATES SHUTTLE CASING FOR SEWINGMACHINES Ignatz Gonyk, Vienna., Austria ApplicationJune 19, 1933, SerialNo. 676,556 In Austria June V25, 1932 3 Claims.

The invention relates to a further development of the shuttle for sewingmachines disclosed in my co-pending application led June 8th, 1932, Ser.No. 616,111 and has for its object to provide for asready removal of thecover. In order to make the cover readily removable resilient elementsare provided on the same or on the shuttle casing, which on looseningthe fastening screws lift the cover off the casing automatically.

10 In a preferred constructional form helical springs are threaded onthe fastening screws which springs tend to push outwards the cover ofthe shuttle casing.

In the annexed drawing an embodiment of the l5 subject matter of theinvention is illustrated by way of example. Fig. 1 is a plan View of thebridge and the shuttle casing with the cover. Fig. 2 is a side elevationpartly in section. Fig. 3 is a rear elevation partly in section, thecover being in the closed position. Fig. 4 is a view similar to Fig. 3,the cover being lifted olf the shuttle casing.

A bridge piece 1, is secured to the workingplate of a sewing machine andhas a recess 16 formed in it for the reception of an annular shuttlecasing 17. In the bottom of the recess at its center there is a bearing2 for a shuttle-driving shaft (not shown). n

The shuttle casing 17 is provided with a radial notch 18 in its interiorperiphery for the needle of the sewing machine. On top of the shuttlecasing there is a at annular cover 24 whose inner periphery is beveledtoward the' shuttle casing. In the cover there are provided indiametrically opposed positions counter sunk screw holes for thereception of screws 26 which pass also through registering apertures 34in the shuttle casing but these latter apertures are somewhat largerthan the screws so that helical springs 35 may be accommodated thereinsurrounding the shank of the screws. 'Ihe screws are threaded into thebridge 1 in position so that the axis of the bearing 2 will be coaxialwith the shuttle casing 17 and cover 24.

To readily secure the cover 24 in position the heads of the screws 26are cut away along parallel chords and the bottoms of the screwapertures in the cover' 24 are slotted as at 28 so that they may permitthe withdrawal of the cover over the screw heads when they are parallelto the slots. Correspondingly when the screw heads are turned 90 thecover 24 will be locked on the casing 17. The springs 35 will forcethe'cover 24 up when the screw heads and slots 28 are the fasteningscrews 26 are not screwed into the 6 shuttle casing 17 but into thebridge 1. vAt the points of the shuttle casing 17 where the fasteningscrews 26 pass therethrough, the shuttle casing is provided with bores34 suciently large to accommodate not only the fastening screws 26 butalso the helical springs 35 threaded on these screws. In the closedposition of the cover the helical springs 35 are compressed, as shown inFig. 3. If now the fastening screws are turned through angles of fromtheir positions shown in Figs. l and 3 in the direction for looseningthe same, the heads of the screws can pass through the slots of thecover and then the helical springs 35 force the .cover 24 upwards andthe cover. may be readily removed, as will be seen from Fig. 4.

What I claim is:

1. In a sewing machine a shuttle casing, a cover for said shuttlecasing, at least two fastening screws connecting the cover to thecasing, and resilient means interposed between the casing and the saidcover whereby the cover is lifted off the casingv whenever the fasteningscrews are turned in a predetermined direction for loosening the same,said shuttle casing being provided with a corresponding number ofrecesses the bottom part of such recesses corresponding. in size andkshape to the size and shape ofthe heads of the screws and the top partof the said recesses being of a diameter greater than the greatestdiameter of the said heads.

2. In a sewing machine a shuttle casing, acover for said shuttle casing,at least two fastening screws connecting the cover to the casing, andresilient means interposed between the casing and the said cover wherebythe cover is lifted o the casing whenever the fastening screws areturned in a predetermined direction for loosening the same, said shuttlecasing being provided with a corresponding number of recesses the bottompart of said recesses corresponding in size and shape to the size andshape of the headsV of the screws and the top part of the said recessesbeing of a diameter greater than the greatest diameter of the saidheads, said' resilient means comprising helical springs threaded on saidfastening screws and bearing at one end against said shuttle casing andat the other against said cover.

3. In a sewing machine a shuttle casing, Aa cover for such shuttlecasing, at least two fastening screws connecting the cover to thecasing, and resilient means interposed between the casing and the saidcover whereby the cover is lifted off the casing whenever the fasteningscrews are turned in a predetermined direction` for loosening the same,said shuttle casing being provided with a corresponding number ofrecesses the bottom part of such recesses corresponding in size andshape to thesize andshapev ofthe heads of the screws and the top part ofthe said recesses being of a diameter greater than the greatest diameterof the said heads, said resilient means comprising helical springsthreaded on said fastening screws and bearing at one end against saidshuttle casing and at the other end against said cover, and beingenclosed in bores in said shuttle casing.

' IGNATZ GONYK.

